So today, my mom decided to go to petsmart and buy some new fish for her tank. She brought me home a blue mystery snail and some cory bottom feeder?

Well I put the snail, who's name is Robert, in with my male betta, Sky. Sky's tank is a sectioned off part of a 10 gallon. It gets no circulation so I thought a bottom feeder would be nice. At first, the snail didnt bother him. But when it started to move, he went after it. He literally took a chunk out of it. I watched him spit it out. So I removed the snail and put it in my females side. I took the cory fish out of my females side and put it in his side. He notcied it right away and went after it. He bit it and shook it. I paniced and took the cory out too.
Is this normal behavior? Or should I just put them both in my females side?